Security Flaw: Claude 4 AI and GitHub MCP Vulnerable to Leaking Private Repositories; Researchers Warn Users

Luca Beurer-Kellner on X: "😈 BEWARE: Claude 4 + GitHub MCP will leak your private GitHub repositories, no questions asked. We discovered a new attack on agents using GitHub’s official MCP server, which can be exploited by attackers to access your private repositories. creds to @marco_milanta (1/n) 👇 https://t.co/ES9nuv2lzc" / X

PostConversationLuca Beurer-Kellner@lbeurerkellner BEWARE: Claude 4 + GitHub MCP will leak your private GitHub repositories, no questions asked. We discovered a new attack on agents using GitHub’s official MCP server, which can be exploited by attackers to access your private repositories. creds to @marco_milanta (1/n) 8:19 AM · May 26, 20251,799 Views...